When Amprion erects new pylons, it’s not absolutely essential to take the line in question out of service. Thanks to what are known as “temporary loading arrangements”, expansion of the grid progresses without putting the grid under any additional load.
Please click on one of the spots to learn more.
Thanks to its modular design, the pylon can be configured for any application. The number, width and arrangement of the “pylon arms” – two beams on either side make up a “cross-arm” – can be configured individually.
Number of conductors
The number of conductors carried by the pylon can also vary. Depending on requirements, the pylon can carry up to two circuits. Each circuit consists of three phases with up to four individual cables each.
The modular system shortens assembly and disassembly times: pre-assembled elements are kept in store ready to be called up. This enables the mast to be erected within two days.
Foot of the pylon
As a rule, only minor civil engineering work is required when erecting the temporary pylon. Due to the fact that the foot of the pylon is weighted down with concrete blocks, the impact on the ground is particularly low.
The modular design of the pylon also offers advantages during transport: the separate parts are delivered to the installation locations and assembled using commercially available machinery.
End of the project
At the end of the project, the pylon is dismantled just as quickly as it was erected and leaves no lasting traces where it stood.
Just suppose an important motorway is closed completely for a period of weeks for construction work – a horrible thought for commuters and traffic planners alike. How do you divert the traffic? Can nearby motorways take up the extra load? Or is there a real threat of massive traffic jams that bring the entire region to a standstill?
Grid planners at Amprion have similar worries when they think about the extent of grid expansion essential in the wake of the energy revolution. Hundreds of pylons along vital transmission routes have to and will be renewed in the coming years. Shutting down these lines during the construction work would lead to real bottlenecks in the already heavily loaded power grid. Amprion therefore intends to use “temporary loading arrangements” at sensitive construction sites within the grid: mobile pylons that make it possible to run the power lines around the construction sites, like a temporary bypass.
Like between Kruckel, near Dortmund, and Dauersberg in the Rhineland-Palatinate. This power line is part of an important north-south link that will in future increasingly transport wind power from the north to the consumption centres in the south. Starting in 2021, a 126-kilometre stretch of the existing overhead line is to be upgraded in order to transmit electricity in the future at a voltage of 380 instead of 220 kilovolts. This will significantly increase the transmission capacity of the line. During the planning phase, it quickly became clear that the power line will have to remain in operation during this upgrade work.
Temporary load arrangements are a flexible and practical solution to this problem. This is because the mobile pylons are erected right next to the existing pylons and take over their conductor cables for a limited period. They follow a modular
principle and can be adapted to any application. This was a crucial design feature Amprion paid special attention to when its technicians collaborated with external engineering consultants to develop this new type of pylon. The new temporary load arrangements have been undergoing trials since 2018, and 2021 will see the commencement of large-scale deployment between Kruckel and Dauersberg – with more than 100 mobile pylons being installed.
Text: Meike Pedack